CN105899248A

CN105899248A - Auto-injection device with button activation

Info

Publication number: CN105899248A
Application number: CN201580003561.XA
Authority: CN
Inventors: B.G.克杰德森; B.莫里德森
Original assignee: Novo Nordisk AS
Current assignee: Novo Nordisk AS
Priority date: 2014-01-03
Filing date: 2015-01-05
Publication date: 2016-08-24
Also published as: EP3089777A1; WO2015101669A1; US20160317745A1

Abstract

The present invention relates to an auto-injection device (100) repeatedly activateable for automatically expelling multiple set doses of a liquid drug. An activation button (190) protrudes from a proximal end of a housing (101 ) and is axially moveable between an activateable position and an activated position. The auto-injection device includes dose setting means comprising a dose setting device (170) that performs a helical movement away from a zero dose position during setting of a dose and returns by a helical movement to the zero dose position as the set dose is expelled. The dose setting device (170) is coupled to the activation button (190) to retain the activation button in the activated position when the dose setting device (170) assumes its zero dose position.

Description

Utilize the automatic injection device pressing button activation

The present invention relates to for setting and the automatic injection device setting dosage of drain medicine.Especially, the present invention relates to the spring driven injection device of the type wherein activating activator button to trigger equipment.

Background technology

Medical medicine conveying equipment is for being transported to patient by the medicine of selected dosage.Some medicines, such as insulin, be self-administer.Typical diabetics would be required to inject insulin several times during the process of a day.

Prior art medicament delivery device, the such as injection device disclosed in WO 01/95959 provides the user close friend and accurate equipment, and wherein, the major part about patient demand requires to be satisfied.In such a device, discharge machinery is completely manual, and in this case, dosage dials tune component (dial Member) and injection button during dosage setting corresponding to set dosage size proximal movement, and then make its distal movement with dosage set by discharging by user.This equipment generally optionally operates in one of two different modes (that is, dosage setting state and dosage discharges state).Dosage is dialled tune component/injection button and can slightly axially be moved, to switch between two modes of operation.May be incorporated into breech lock function, for the memory period at equipment, injection device is maintained in dosage discharge state.

A kind of automatic injection device is at EP 338, and disclosed in 806, wherein, energy is stored in spring during dosage setting.The side part that the triggering sliding part of spring biasing is arranged to from equipment is stretched out.After operation triggers sliding part, the energy of release storage, thus cause discharge machinery in axial direction to drive piston rod, thus cause setting dosage to be injected.Closer to automatic injection device generally use activator button, its proximal end being arranged to from apparatus casing is stretched out.The example of this automatic injection device is at WO Disclosed in 06/076921 and WO 2008/116766.

Although automatic injection device compares completely manual injection device possesses many advantages, but the user feedback received during operation may reduce.In completely manual injection device, user may be only by the progress observing or discovering by experiencing the persistent movement of injection button in sense of touch injection, and in the automatic injection device of the above-mentioned type, be generally only user and the instruction completed about complete dosage is provided.

GB2443390 discloses a kind of drug delivery apparatus, and it includes automated drive and is configured for the trigger that the user of radial motion can activate.Reel can rotate and can be slidably mounted in sleeve pipe, and includes the spiral path that the cam follower being suitable to being placed on trigger engages.Before setting dosage, need rotating drum before the cam follower of trigger is fallen in spiral path.Further, WO 2009/097934 discloses a kind of injection device, and it is configured for carrying a series of preset dose.Preactivate device is rotated to just facilities, and subsequently, the activation device of ejector button form can be pressed into activate medicament conveying.

In view of above-mentioned, it is an object of the invention to provide the automatic injection device of improvement for injecting multiple variable setting dosage, its operation is very simple and it does not require to carry out user any explanation, but wherein, the work of injection device is self-explantory.

Summary of the invention

In disclosure of the invention, embodiment and aspect will be described, its one or more by above-mentioned purpose, or it is by for purpose obvious from disclosed below and from the description to exemplary embodiment.

Therefore, in a first aspect of the present invention, relate to set and the automatic injection device setting dosage of drain medicine, comprising:

-limiting distal end and the housing of proximal end, this housing is suitable to receive sleeve, in order to liquid medicine can be gone out by the connection faller gill at the distal end of housing,

-dose setting device, it includes the dosage setting equipment being configured to be rotated relative to housing by screw,

-discharge machinery, it includes being configured to and then activate the Spring driving from keeping sleeve automatically to discharge setting dosage,

-activator button, its can be activated so that setting dosage can be discharged, and

-release spring, it provides towards the power that can activate position propelling activator button,

Wherein, automatic injection device limits breech lock, this breech lock includes the breech lock geometry being connected to activator button and is connected to the cooperation reservation geometry of dosage setting equipment, breech lock is configured to the power of opposing release spring when activator button has been activated and is retained in by activator button in activation position

Wherein, activator button stretches out from the proximal end of housing and activating position and can activate axially-movable between position, and dosage setting equipment is the most coupled relative to housing, so that it performs screw away from zero dose position during the setting of dosage, and return to zero dose position when set dosage is discharged by screw

Wherein:

A) when dosage setting equipment presents its zero dose position, cooperation reservation geometry presents and retains the cooperation between geometry and breech lock geometry with the realization when activator button presents its activation position in cooperation relative to the predetermined axial location of housing, and

B) when dosage setting equipment presents any other position in addition to zero dose position, cooperation retains geometry and presents the axial location for activator button is retained in the cooperation in its activation position prevented between cooperation reservation geometry and breech lock geometry.

In such configuration, until first automatic injection device is operable to set dosage, activator button is still in it activates position.When dosage setting equipment is in its zero dose position, promote activator button meaningless.When activator button is still in it activates position, such as, during the position pressed, become clear that for a user, needed to carry out dose setting procedure before operation activator button.Equipment expect the understanding of use by increasing by this.When dialling big by dosage, activator button will be released spring and promotes and will be moved to it and can activate in position, and such as activator button will be ejected in extended position.This sends equipment and is loaded the signal of (dosage is set), and is currently capable of activating described activator button.

Having operated dosage setting equipment after selecting suitable dosage, activator button can be manually pushed back into it and be activated in position, thus realizes setting the discharge of dosage.During discharge program, when dosage setting equipment returns to its zero dose position, whole dosage has been discharged and breech lock will re-engage with, to be retained in by activator button in its activation position.Therefore, user receives the feedback that whole dosage has been discharged.

According to above, the proximal end that activator button is arranged to from housing is stretched out.After set the size of dosage by user, may then pass through and apply the outside distal force applied, make activator button move to its activation position (i.e. from position (that is, proximal location) can be activated, remote location) in, in order to the discharge setting dosage can be triggered.In a particular embodiment, when activator button is in activation position, activator button is completely embedded in housing, or is alternatively completely embedded in the part of energy manual operation of dose setting device.In such an embodiment, as extra advantage, owing to activator button does not extends from the housing of equipment, so when stored, this equipment will occupy less space.

In certain embodiments, activator button directly operates and activates discharge layout, in order to when activator button is manually moved in its activation position, setting dosage automatically discharged by Spring driving machinery from sleeve.By this way, activator button is arranged to be used for triggering the release button of discharging operation.

Automatic injection device can include that needle shield is connected to the entry needle of sleeve with protection in certain embodiments.Needle shield can slide axially relative to entry needle and can operate between extended position and retracted position.When needle shield is in extended position, prevents the skin of user to be injected needle-penetration, and when needle shield is in retracted position, pin can be pierced the skin of user.In certain embodiments, needle shield is coupled to discharge and arranges, in order to when needle shield is moved to retracted position from extended position, and needle shield activates discharge layout and sets dosage to discharge, i.e. needle shield forms trigger element.In such an embodiment, it is arranged in the activator button at the proximal end of housing and can be operably linked to needle shield as follows, i.e. make needle shield when being in extended position, as long as activator button is in can activate position, just will prevent needle shield from moving in retracted position.Dialling tune component having operated dosage and be discharged into by activator button after it can activate in position, needle shield is allowed to move in its retracted position, thus realizes discharging the activation arranged automatically to discharge setting dosage.Therefore, automatic injection device is configured to the equipment that needle shield triggers, and it is manually triggered against injection position by pressing needle shield.But, after equipment is configurable to so that only at first dosage by making dosage setting equipment moving be set away from zero dose position, and next activator button has moved in its activation position, needle shield triggering is only possible.In such an embodiment, activator button is used as safe release component, and it was required before realizing needle shield triggering to be operated.

In the context of the present invention, dosage setting equipment is configured to mean that dosage setting equipment is connected with each other with associating housing parts by the definition rotated relative to the screw of housing, in order to make can occur in-between relative rotary motion.Described housing parts can limit window component, and it is positioned adjacent to dosage setting equipment, in order to being placed in the dosage indicia on dosage setting equipment visually can be observed in the window formed by window component.During dosage setting and during dosage is discharged, relative spiral rotating is occurred to move between dosage setting equipment and window component.In certain embodiments, dosage setting equipment rotates relative to window component.In other embodiments, window component rotates relative to dosage setting equipment.In other embodiments again, during dosage setting, a selected first component from dosage setting equipment and window component rotates relative to another parts, and during dosage is discharged, described " another parts " rotate relative to first component.When relating to the dosage setting equipment performing screw, whole described situations are all interpreted to be included by claims.

In the context of the present invention, definition " dosage setting equipment is the most coupled relative to housing so that it performs the screw away from zero dose position during the setting of dosage " means, during the setting of dosage, when dosage is dialled big, dosage setting equipment (or window component) performs the screw away from zero dose position.In certain embodiments, automatic injection device is configurable to so that the dosage initially dialled can be reduced by stirring dosage setting equipment downwards, in order to it performs the screw towards zero dose position not having liquid medicine in the case of automatic injection device is discharged.

According to this structure, when dose set device, dosage setting equipment and housing occur to move to axial.Generally, when dosage setting equipment is rotated, dosage setting equipment is relative to activator button axially-movable.The corresponding cooperation latch feature associated to dosage setting equipment and activator button can be arranged in order to it and relative to each other be oriented to, only when dosage setting equipment presents precalculated position, or alternatively, present predetermined can in the subset of position location one time, breech lock becomes to engage.

In certain embodiments, when activator button is presented its activation position and is retained by the cooperation between breech lock geometry and cooperation reservation geometry, dosage setting equipment discharges breech lock away from the rotation of its zero dose position, with will pass through release spring try hard to recommend into, activator button is automatically moved to can activate in position.

In certain embodiments, breech lock includes that one or more groups latch feature that cooperates, each group of cooperation latch feature all include and the breech lock geometry retaining geometry cooperation that cooperates.

In a further embodiment, automatic injection device is configured for multipurpose operation, and therefore repetitive operation can set and discharge numerous dosage individually given.

After discharging the whole amount of the dosage individually set, activator button is retained in activation position, until dosage setting equipment is operated and again stirred away from its zero dose position.This is by the realization of specifically moving of position relative to activator button during dose setting procedure and during dosage discharge program of dosage setting equipment.

At least one included a in described groups of cooperation latch feature) the breech lock geometry that is placed on activator button；With cooperation b) being placed on dosage setting equipment retains geometry.Described groups of breech lock geometry and cooperation retain each of which in geometry and are configurable to so that when dosage setting equipment presents its zero dose position and when activator button presents its activation position, and breech lock geometry engages cooperation and retains geometry to be retained in by activator button in activation position.

Automatic injector can be configured so that when dosage setting equipment presents any other position in addition to zero dose position, cooperation retains geometry and is spaced axially away from corresponding breech lock geometry, thus prevents breech lock to be retained in by activator button in activation position.

Owing to dosage setting equipment performs the screw away from zero dose position during the setting of dosage and performs screw when setting dosage and being discharged, so being changed in the position to axial that breech lock geometry and cooperation retain between geometry, so that breech lock can become when stirring away from zero dose position to be released, and only just become the most latched when following two states for breech lock all occur:, a) dosage setting equipment presents its zero dose position, and b) activator button presents its activation position.

It is coupled that dosage setting equipment can be threaded connection (the most lasting is threadedly engaged) relative to other structures in equipment.The threaded screw thread that can be arranged in certain embodiments there is constant lead.In other embodiments, threaded helical pitch can be arranged along that the extension of screw thread has can one or more thread segments of Changeable Lead.In certain embodiments, dosage setting equipment threadingly engages the window component of equipment, in order to when dosage setting equipment is rotated, dosage setting equipment is relative to window component axially-movable.Described window component can be attached to the housing of equipment, or alternatively, is integrally formed with the parts forming housing.Threaded being arranged for persistently engages.Therefore, during setting dosage and during discharging setting dosage, maintenance is threadedly engaged.

Dosage setting equipment is configurable to can be positioned in multiple angled resting position relative to housing.Therefore, dosage setting equipment is configurable to for being manipulated by, in order to rotate before and after between the scope that discontinuous cyclostasis is put.The plurality of angled resting position can be evenly distributed on zero dose position and maximum can set between Dose location.

In a particular embodiment, dosage setting equipment can be rotated by the rotary motion more than 360 degree relative to housing.Therefore, in certain embodiments, dosage setting equipment may be structured to the operable dosage setting equipment of multi-turn.

Dosage setting equipment can be formed scale drum in certain embodiments, and it has a series of dosage instruction being disposed thereon along spiral path.In other embodiments, dosage setting equipment is not necessarily arranged to scale drum, but is arranged without the parts of graduation indication, in being such as hidden in housing and from the sightless parts of hull outside.Dosage setting equipment is preferably when dosage is tuned up relative to secondary component away from zero dose position axially-movable and the parts that return to zero dose position when discharge dosage.According to some embodiment, when at least during dosage setting, these parts are moved, these parts can rotate relative to secondary component.

Dose setting device can include that the dosage of energy manual operation dials tune component, and it is arranged to rotate relative to housing or relative to described window component, in order to set the size of dosage to be discharged.Dosage setting equipment can be dialled tune component and couple as follows with dosage, i.e. so that dosage setting equipment rotates when manual rotation dosage dials tune component.In certain embodiments, dosage dials tune component relative to housing axial restraint.In such an embodiment, dosage setting equipment can be connected to dosage and dial tune component so that prevents from rotating against and so that can occurring to move to axial.In other embodiments again, dosage setting equipment is at least partially formed dosage and dials tune component, in order to dosage setting equipment limits element, and described element can manually be held by user and can rotate relative to housing to set dosage.In certain embodiments, dosage setting equipment be pivoted away from the rotation amount of zero dose position by with set being in proportion of dosage.

Breech lock is configurable to so that when dosage setting equipment presents any other position in addition to zero dose position, it is latched in when activator button is positioned in activation position and does not retain activator button, and discharge spring and work so that activator button can activate position motion towards it.But, in some embodiments of automatic injection device of the dosage setting equipment discontinuous resting position of offer are provided, when dosage setting equipment is positioned in the resting position corresponding to zero dose position and the first continuous resting position (i.e., the resting position adjacent with zero dose position) between centre position in time, breech lock is configurable to be retained in activator button in activation position.In such an embodiment, breech lock is configured to when dosage setting equipment is presented on the position of rotation in the described first continuous resting position to maximal dose position range, it is latched in activator button to present when it activates position and do not retain activator button, and discharges spring and work so that activator button can activate position motion towards it.

In certain embodiments, breech lock geometry includes hook component, and cooperation retains geometry and includes path (track), and it is arranged to when dosage setting equipment rotates receive hook component towards its zero dose position, thus retains hook component to resist axial displacement.

This structure can such as have for L-shaped path, and it is suitable to receive and retain the part that can include the hook component for the enlarged head being inserted in path.In other embodiments, path instead forms the depression being suitable to receive the extension of hook component.

In alternative embodiments, breech lock geometry includes fastened component, and cooperation retains geometry and includes engaging retainer, wherein, when activator button and dosage set device present predetermined relative orientation, fastened component can be received and is retained by engaging retainer with discharging.

In certain embodiments, automatic injection device includes one or more fastened component, and each of which is arranged to engage the engaging arm of corresponding engaging retainer.

Other embodiments include automatic injection device, wherein, one in activator button and dosage set device includes cylinder, wherein, engaging retainer includes the circumferentially extending shoulder step (ledge) being arranged on described cylinder, and wherein, fastened component is arranged to engaging arm, it is configured to present dosage setting equipment while that it activating position at activator button and engages described circumferentially extending shoulder step when presenting its zero dose position and engage after described circumferentially extending shoulder step.

Fastened component is configurable to when dosage setting equipment is pivoted away from zero dose position, and and then dosage setting equipment is relative to the motion of activator button, from engaging retainer release.

Therefore, when user apply moment of torsion on dosage setting equipment time (the most manually dose dial tune component away from zero dose position), when applying the moment of torsion beyond predetermined threshold, fastened component or engaging arm are from engaging retainer release, and the power that activator button is provided due to release spring is automatically moved to activate position.

In certain embodiments, and then dosage setting equipment is pivoted away from zero dose position, and when dosage setting equipment is relative to activator button axially-movable, fastened component or engaging arm depart from engaging from engaging retainer.In such an embodiment, activator button may or may not rotate fixing relative to housing.In other embodiments, and then dosage setting equipment is pivoted away from zero dose position, and when dosage setting equipment is relative to activator button rotary motion, fastened component or engaging arm depart from engaging from engaging retainer.In such an embodiment, activator button rotates fixing preferably relative to housing.

Breech lock geometry can include flexible member, when activator button by from its can activate position move to activate dosage setting equipment maintains its zero dose position simultaneously in position time, flexible member can bend.Therefore, flexible member is used for retaining geometry so that breech lock geometry can engage cooperation.

In such an embodiment, having been started up and activator button has been released to after it can activate in position at dose setting procedure, activator button can be again brought up it and be activated in position, although being previously also not carried out any discharge after dose setting procedure.If user dials heavy dose due to mistake, user is by dosage setting equipment clawback to its zero dose position then, then be likely to occur this situation.This can activate generally making activator button stay it in position.But flexible member makes, only by being applied to distal force on activator button manually promote activator button to activate in position to it, breech lock geometry to be engaged cooperation and retain geometry, thus set up the reservation of activator button.For being incorporated with the embodiment of hook and path configuration and in the embodiment being incorporated to described fastened component and engaging keeper, both of which can obtain this function.

In certain embodiments, retain in geometry one of breech lock geometry and cooperation includes tilting cam, breech lock geometry and cooperation simultaneously retain in geometry another include the cam follower for engagement angled cam.Tilting cam and cam follower be configurable in case the distal force not having outside applying be applied to activator button and activator button present can activate position time, tilting cam and cam follower work when dosage setting equipment returns to zero dose position so that activator button moves to it activates in position.Term " tilting cam " is construed as to imply that cam extends with angle of inclination relative to following axis, and release button is along described axial-movement.For pen-formed device, such axis is typically central axis, and during setting the discharge of dosage, the piston of sleeve moves along this central axis.

In a further embodiment, breech lock geometry and cooperation reservation geometry are configured to and then dosage setting equipment and return to its zero dose position, engage when cooperation retains geometry in breech lock geometry and produce ticktack.Therefore, the termination of dosage ticktack can provide by means of breech lock function, thus has sent the signal of the discharge setting dosage.

The Spring driving of automatic injection device can include piston the driving element and being connected to drive the spring element of element towards distal movement being configured for making holding sleeve.Spring element be configurable to for keep storage energy, and activate time, release energy for advance driving element to drive piston, thus during discharge program discharge setting dosage.In certain embodiments, piston rod is arranged to make the piston of holding sleeve and drive element to interconnect.

Discharge machinery and may also include the clutch element being connected to activator button with driving element, to control the release of the storage energy of spring element.When activator button is in activation position, clutch element makes it possible to the energy of release storage, and when activator button is in and can activate position, clutch element prevents the energy of release storage.

In some embodiments of automatic injection device, equipment is configurable to during discharge program, and then to remove the outer distal end power being initially applied on activator button, the power of release spring works so that activator button moves to activate position, thus interrupts discharge program.When recovery applying outer distal end power is on activator button, the discharge of the remainder of the dosed administration interrupted will be continued.

In second aspect, the present invention relates to for setting and the automatic injection device setting dosage of drain medicine, comprising:

-limiting distal end and the housing of proximal end, housing is suitable to receive sleeve, in order to liquid medicine can be gone out by the connection faller gill at the distal end of housing,

-dose setting device, it is included in the dosage setting equipment of axially-movable in housing, dosage setting equipment is configured to during dosage setting be axially displaced away from zero dose position in a first direction, and axially upwardly move when set dosage is discharged in the side relative with first direction and return to zero dose position

-discharge and arrange, it includes and then activating automatically discharges the Spring driving machinery setting dosage from sleeve,

-activator button, it is disposed at the proximal end of housing and can be activated so that setting dosage can be discharged, and activator button activating position and can activate axially-movable between position, and

-release spring, it provides towards the power that can activate position propelling activator button.

Automatic injection device limits breech lock, described breech lock is configured to the power of opposing release spring when activator button has been activated and is retained in by activator button in activation position, described breech lock is configured to when dosage setting equipment presents its zero dose position when activator button is retained in the position activated in position and be configured to outside dosage setting equipment presents zero dose position be not retained in by activator button in activation position, in order to when dosage setting equipment is axially displaced away from its zero dose position, activator button is automatically moved into and can activate position.

In a third aspect, the present invention relates to for setting and the automatic injection device setting dosage of drain medicine, comprising:

-dose setting device, it includes the dosage setting equipment arranged revolvably in the housing, dosage setting equipment be configured to during the setting of dosage perform screw away from zero dose position, and set dosage be discharged time return to zero dose position by screw

Automatic injection device limits breech lock, described breech lock is configured to the power of opposing release spring when activator button has been activated and is retained in by activator button in activation position, described breech lock is configured to when dosage setting equipment presents its zero dose position when activator button is retained in the position activated in position and be configured to outside dosage setting equipment presents zero dose position be not retained in by activator button in activation position, in order to when dosage setting equipment is pivoted away from its zero dose position, activator button is automatically moved into and can activate position.

Relevant device in second and third aspect can include the combination of any one in the feature as limited or feature above in conjunction with first aspect.

Definition

" injection pen " is typically injecting apparatus, and it has and is somewhat similarly to the rectangle of the pen for writing or elongated shape.Although this pen is generally of tubular section, but they can easily have different cross sections, such as triangle, rectangular or square when or any change around these geometries.

Term " pin intubation " or " pin " perform the actual catheter pierced through of skin during being described in injection.Pin intubation is generally made up of the most stainless metal material, and is connected to socket to form the complete entry needle being also commonly referred to as " needle assembly " or only " entry needle ".But pin intubation also can be made up of polymeric material or glass material.Socket also carries the attachment means for needle assembly is connected to injecting apparatus, and is generally moulded by suitable thermoplastic." attachment means " can for example, Rule couples, bayonet socket couples, threaded or its any combination, such as at EP Combination described in 1,536,854.

It is specifically designed for needle assembly that an injecting systems is designed at iso standard No.11608, part 2 is defined, and is commonly called " pin ".Needle set has the leading section in the skin for penetrating into user and for penetrating into the rearward end in the sleeve accommodating medicine.

As it is used in the present context, term " medicine " is intended to pass in a controlled manner any medicine that can flow containing medicine of the conveyer device of such as hollow needle, such as liquid, solution, gel or thin suspension.Representative drugs includes such as peptide, protein (such as insulin, insulin analog and C-peptide) and hormonal medicine, biologically-derived or activating agent, medicament based on hormone and gene, nutrient formulation and with solid (modulation) or other materials of two kinds of forms of liquid.

" scale drum " meaning is cartridge by diffusion of volatile treating agent, and it carries the labelling that the user to injection pen indicates the size of selected dosage.The cartridge by diffusion of volatile treating agent constituting scale drum can be solid or hollow." labelling " meaning is to be incorporated to any kind of printing or the symbol otherwise provided, the symbol such as carved or adhere to.These symbols preferably but are the most not exclusively to the Arabic numerals of " 9 " from " 0 ".In conventional injection pen constructs, labelling can be seen by the window arranged in the housing.When " zero dose position " of reference scale drum, this does not necessarily means that digital " 0 " occurs, but its position only referring only to the most also not set the scale drum of dosage.

" sleeve " is the term for describing the container accommodating medicine.Sleeve is generally made up of glass, but also can be by any suitable polymer molding.Sleeve or ampoule preferably can pierce through diaphragm seal at one end through be referred to as " barrier film ", and barrier film can such as be pierced through by the rearward end of entry needle.Opposite end is generally closed by plunger or the piston being made up of rubber or suitable polymer.Plunger or piston can move inside sleeve slidably.Keeping medicine in the space can pierced through between thin film and energy mobile plunger, when plunger reduces the volume in the space keeping medicine, medicine is pressed away.But, any kind of container (rigidity or flexibility) can be used for accommodating medicine.

The neck portion narrowed therein can not being moved to owing to sleeve is generally of rubber plunger, can be discharged so not being accommodated in all medicines inside sleeve.Term " primary quantity " is it is therefore intended that the primary quantity of injectable content.Term " residue content " refers to remaining injectable content in the same manner.

The meaning using term " automatically " in conjunction with injection device is that injection device is able to carry out injection, and does not require that the user of injection device manually provides the power discharged needed for medicine.Power is generally provided by spring equipment (such as gas spring), or as described in this article by being made it produce the offer of the spring element of strain during dosage setting by user.This spring is generally by prestrain, in order to the problem avoiding carrying the least dosage.Alternatively, spring can be pre-loaded to be enough to the prestrain by some dosage emptying medicine sleeve by manufacturer.Generally, when injecting, user activates the breech lock on injection device or button, with release accumulation power in the spring.Hereinafter, term " automatic injection device " is additionally utilized for such automatic injection device.

Referenced herein all lists of references, including publications, patent applications and patents with regard to entire contents and with such as each list of references all by individually and particularly point out the same degree being incorporated herein by and state in this article with entire contents and be incorporated herein by.

All of title and subtitle are used only for convenient in this article, and should not he construed as being limiting in any way the present invention.

(such as, use such as) is only expected the present invention is better described, and unless otherwise stated, does not applies to limit to the scope of the present invention for any and all example provided in this article or exemplary language.The element that any language in the description is all not necessarily to be construed as indicating any failed call to protect is that putting into practice of the present invention is essential.The quoting and being incorporated to only for conveniently carrying out of patent document in this article, and do not reflect the effectiveness of such patent document, patentability and/or enforceability anyways.

The present invention includes all modifications about the theme stated in claims and the equivalent allowed by applicable law.

Accompanying drawing explanation

Hereinafter, the present invention will be further described with reference to the drawings, wherein:

Fig. 1 illustrates the perspective view of prior art equipment,

Fig. 2 illustrates the parts of an equipment of Fig. 1 with decomposition view,

Fig. 3 A and Fig. 3 B illustrates the discharge machinery of an equipment of the Fig. 1 being in two states with cross sectional view,

Fig. 3 C-3E illustrates the parts of an equipment of Fig. 1,

Fig. 4 A illustrates the perspective view of the energy operating element of the first embodiment of the automatic injection device according to the present invention, and wherein, dosage has been set,

Fig. 4 B be shown in shown in Fig. 4 A but the first embodiment after dosage is discharged can the perspective view of operating element,

Fig. 5 A illustrates the perspective view of the partial cut of the automatic injection device of Fig. 4 A that wherein dosage has been set,

Fig. 5 B illustrates the perspective view of the partial cut of the automatic injection device of Fig. 4 B that wherein dosage has been discharged,

Fig. 5 C illustrates the detailed perspective view of the dosage setting equipment of the automatic injection device of Fig. 4 A,

Fig. 6 is shown in dosage setting equipment and the perspective view of activator button of the automatic injection device shown in Fig. 4 A,

Fig. 7 is shown in the side view of the partial cut of the automatic injection device shown in Fig. 4 A,

Fig. 8 A and Fig. 8 B illustrates the discharge machinery of the second embodiment of the automatic injection device according to the present invention with cross sectional view, and wherein, Fig. 8 A illustrates the equipment that wherein dosage has been set, and Fig. 8 B illustrates the equipment that wherein dosage has been discharged,

Fig. 9 A and Fig. 9 B illustrates the discharge machinery of the 3rd embodiment of the automatic injection device according to the present invention with cross sectional view, and wherein, Fig. 9 A illustrates the equipment that wherein dosage has been set, and Fig. 9 B illustrates the equipment that wherein dosage has been discharged, and

Figure 10 is shown in dosage setting equipment and the schematic diagram of activator button of the automatic injection device shown in Fig. 9 A.

Accompanying drawing is schematic and in order to clearly be simplified, and these accompanying drawings illustrate the most essential details just, and other details are removed.Throughout, identical reference number is for identical or corresponding part.

Detailed description of the invention

When such as " top " used below is with " bottom ", " right " and " left ", " level " and the term of " vertically " or similar relative expression, these are only with reference to accompanying drawing and not necessarily refer to actual behaviour in service.Shown figure is to schematically illustrate, and for this reason, the structure of different structure and the expection of its relative size are used only as illustrative purpose.Within this context, may advantageously limit term " distal end " in the accompanying drawings and be intended to refer to the end generally carrying entry needle of injection device, and term " proximal end " is intended to refer to opposed end, it is if sensing of drawing in the drawings is away from entry needle and carry dosage and dial tune component and activator button.

When term component or element are for during to limiting-members, it generally indicates that in the embodiments described, these parts are single piece, but, identical components or element alternately include some subassemblies, two or more be arranged to single piece in parts as depicted, such as, be manufactured to single injection-molded part.When limit component be installed into be axially relative to freely with each other time, it generally indicates that these components can be movable with respect to, generally between the stop position limited, and when restriction component is installed into and relative to each other can rotate freely, it generally indicates that these components can the most freely or rotate between the stop position limited.Term " assembly " and " sub-component " do not imply that described necessary parts can be assembled to provide monoblock or functional unit or sub-component during given assembly program, but are used only for describing because of the parts flocked together the most more being closely related.

Fig. 1 illustrates the prior art medicament delivery device of form of a stroke or a combination of strokes automatic injection device 200 form, i.e. include so-called " injection pen " being incorporated with spring driven discharge machinery.Fig. 2 illustrates the decomposition view of the prior art automatic injection device 200 that figure 1 illustrates.Fig. 3 A and Fig. 3 B is shown in the viewgraph of cross-section discharging machinery of the prior art automatic injection device 200 shown in Fig. 1 and Fig. 2, and wherein, Fig. 3 A illustrates the equipment being in dosage setting state, and Fig. 3 B illustrates that being in dosage discharges the equipment of state.

Under current background, equipment 200 represents " universal " medicament delivery device, thus provides the concrete example of equipment, and this equipment can be modified in order to obtain according to the present invention provides the equipment of the user feedback improved.Because the present invention relates to relate generally to the element of the equipment of user feedback, so the exemplary embodiment that this equipment will be described, to be more fully understood that the present invention.

Equipment 200 includes cap portion 207 and major part, and major part has: with the proximal body of housing 201 or drive components, and medicine is discharged machinery and is arranged or is integrated in；And far-end bushing retainer part, wherein, the transparent sleeve 213 filled with the medicine of the barrier film of distal needle energy pierce is arranged and is retained in appropriate location by being attached to the bushing retainer that can not remove of proximal part, and bushing retainer has the opening allowing to check a part for sleeve and the far-end coupling arrangement 215 allowing needle assembly to be mounted with discharging.Sleeve is provided with the piston that the piston rod by forming the part discharging machinery drives, and can such as accommodate insulin, GLP-1 or growth hormone formulations.The revolvable dosage of most proximal end dial tune component 280 for manually setting the desired amount of the medicine shown in display window 202, and its then can activate release button 290 time be discharged.Depending on the type discharging machinery implemented in medicament delivery device, discharge machinery and can include such as spring in the embodiment shown, there is strain and then is released to drive piston rod when activating release button 290 in it during dosage setting.

As present, Fig. 1 illustrates the medicament delivery device of prefilled type, i.e. it is supplied with the sleeve of pre-installation and abandons when sleeve has been drained.In alternative embodiments and according to the present invention, medicament delivery device can be designed such that the sleeve of loading can be replaced, such as, form with " rear load " medicament delivery device, wherein, bushing retainer is suitable to remove from equipment major part, or alternatively with the form of " anterior loading " equipment, wherein, sleeve is inserted into by the distal openings in being the most removably attached to the bushing retainer of major part of equipment.

More specifically, with reference to Fig. 2, pen includes that the tubular shell 201 with fenestrate opening 202 and bushing retainer 210 are fixedly secured on it, the sleeve 213 of medicine filling is disposed in bushing retainer.Bushing retainer is provided with: far-end coupling arrangement 215, so that needle assembly 216 can be mounted with discharging；With the near-end coupling arrangement of two opposed lugs 211 forms, install thus cover sleeve keeper and mounted needle assembly so that cap 207 can discharge ground；And prevent the protuberance 212 that pen rolls on such as desktop.In housing distal end, nut member 225 is fixedly mounted, and nut member includes screwed hole of centre 226, and in housing proximal end end, the spring base component 208 with central opening is fixedly mounted.Drive system includes: threaded piston rod 220, and it has two relative longitudinal flutings and is received in nut member screwed hole；Annular piston bar drives element 230, and it is rotatably disposed in housing；And ring clutch element 240, its with drive element (see below) to rotate to engage, this joint makes the clutch element can axially-movable.Clutch element is provided with external spline element 241, its corresponding spline being adapted to engage on enclosure internal surface, this makes clutch element can move between remote location (wherein, spline is disengaged) at the proximal location (wherein, spline is in joint) of spin locking with the most freely.As just mentioned, in whole two positions, clutch element 240 is all rotationally locked to drive element 230.Element is driven to include centre bore, it is with two opposed lugs 231 engaged with the groove on piston rod, whereby, due to being threadedly engaged between piston rod and nut member, so driving the rotation of element cause the rotation of piston rod and therefore cause piston rod to far-end axially-movable.Driving element also to include the most circumferentially extending paired flexible arm of ratchet 235, it is adapted to engage with the corresponding hook tooth 205 being arranged on enclosure internal surface.Element and clutch element is driven to include the draw bail of cooperation, the two is locked together by this draw bail rotatably, but it is so that clutch element can axially-movable, this makes clutch element can axially move to its remote location, in this remote location, clutch element can rotate, thus from the system (see below) of stirring, rotary motion is transferred to drive system.Clutch element, drive the interaction between element and housing will be illustrated and reference Fig. 3 C and Fig. 3 D is described in further detail.

Content terminates (EOC) component 228 and is threadedly mounted on piston rod, and packing ring 227 is rotatably mounted on distal end.EOC component includes paired relatively radially protuberance 229, to engage with replacement pipe (see below).

The system of stirring includes ratchet pipe 250, resets pipe 260, the scale drum 270 of the dosage numbers row arranged with external helicoid, dials tune component 280, release button 290 and torsion spring 255(and see Fig. 3 A and Fig. 3 B for setting the dosage of the user operation of drug dose to be discharged).It is installed in inside ratchet pipe with resetting pipe axial lock, if but being allowed to rotate mass dryness fraction (participating in hereafter).Resetting two relative longitudinal flutings 269 that pipe is included in interior surface thereof, it is adapted to engage with the radially protruding part 229 of EOC component, and whereby, EOC can rotate by resetting pipe and be allowed to axially-movable.Being installed on the outer distal end end sections of ratchet pipe 250, this regulation ratchet pipe can engage with housing rotation via clutch element axially-movable one-tenth and depart to rotate with housing and engage clutch element axial lock.Dosage is dialled tune component 280 axial lock but can be rotatably installed on housing proximal end end, dosage is dialled tune component and is rotationally locked under normal operation reset pipe (see below), whereby, dosage dials the corresponding rotation adjusting the rotation of component to cause corresponding rotation and the therefore ratchet pipe resetting pipe.But release button 290 is axially locked replacement pipe can rotate freely.Return spring 295 is at button and is installed on its replacement pipe provide the power guided towards near-end.Scale drum 270 is disposed in the circumferential space between ratchet pipe and housing, reel is rotationally locked to ratchet pipe via cooperation longitudinally splined 251,271 and the interior surface via cooperation helicitic texture 203,273 with housing rotates and is threadedly engaged, whereby, when reel is rotated relative to housing by ratchet pipe, numeral row is by window opening 202 in the housing.Torsion spring is disposed in the circumferential space between ratchet pipe and replacement pipe, and at its proximal end, be fixed to spring base component 208 and at its distal end, be fixed to ratchet pipe, whereby, when ratchet pipe rotates relative to housing by dialling the rotation adjusting component, spring strains.Ratchet mechanism with flexible arm of ratchet 252 is arranged between ratchet pipe and clutch element, clutch element is provided with internal circumferential toothing 242, each tooth is provided which ratchet stop moving part, ratchet pipe is maintained in following position, i.e., when setting dosage, ratchet pipe is rotated to this position by user via resetting pipe.Can reduce so that set dosage, ratchet release mechanism 262 is arranged on replacement pipe and above and acts on ratchet pipe, this makes to set dosage and component can be adjusted to reduce one or more ratchet increment by rotating described group along relative direction, if when resetting pipe and rotating above-mentioned mass dryness fraction relative to ratchet pipe, release mechanism activated.

Have been described with discharging different parts and the functional relationship thereof of machinery, next Primary Reference Fig. 3 A and Fig. 3 B is described the operation of machinery.

Machinery is regarded as two systems interacted, sosimetric system and stir system, and this is described above.During dosage setting, stir the torsionspring that machinery rotates and loading spring drives.Dosage machinery is locked into housing and can not move.When a button is pressed, dosage machinery discharges from housing, and due to the joint with the system of stirring, the system of stirring is rotated back to starting point and makes sosimetric system rotate with the system of stirring by torsionspring now.

The core of dosage machinery is piston rod 220, and the actual displacement of plunger is performed by piston rod.During dosage carries, piston rod is by driving element 230 to rotate and owing to interacting, so piston rod distally travels forward with the screw thread of the nut member 225 being fixed to housing.Between rubber piston and piston rod, putting piston packing ring 227, it supports with acting on the axial of rotary-piston bar, and makes the equalization of pressure on rubber piston.When piston rod has noncircular cross section, wherein, piston rod drives element to engage with piston rod, drives element to be rotationally locked to piston rod, but can be freely-movable along piston rod axis.Therefore, the rotation of element is driven to cause the linear forward movement of piston.Driving element to be provided with little arm of ratchet 234, it prevents from driving element to turn clockwise (observing from button end).Due to the joint with driving element, piston rod can the most only travel forward.During dosage carries, drive element to rotate counterclockwise, and due to the joint with hook tooth 205, arm of ratchet 235 provides the user little ticktack, the most often discharges one ticktack of units of insulin.

Turning to the system of stirring, dosage is dialled tune component 280 by rotation dosage and is set and resets.When rotating shifting part, reset pipe 260, EOC component 228, ratchet pipe 250 and scale drum 270 all along with it rotates.When ratchet pipe is connected to the distal end of torsion spring 255, spring is loaded.During dosage setting, due to the interaction with the inner teeth structure 242 of clutch element, the arm 252 of ratchet is that each unit stirred performs to stir ticktack.In the embodiment illustrated, clutch element is provided with 24 ratchet stop moving parts, rotates 24 ticktacks (increment) of offer hence for relative to complete 360 degree of housing.Spring is preloaded during assembly, and this makes machinery can carry little and big dosage in receptible speed interval.Owing to scale drum engages with the rotation of ratchet pipe, but can move in the axial direction and time scale drum and housing are threadedly engaged, so when system is stirred in rotation, scale drum will be moved in a spiral mode, corresponding to setting the numeral of dosage shown in housing window 202.

Ratchet 252,242 between ratchet pipe and clutch element 240 prevents spring from blocking part.During resetting, reset pipe and make arm of ratchet 252 move, thus ticktock ground release ratchet one by one, in the described embodiment, a ticktack corresponds to a unit IU of insulin.More specifically, when dialling tune component and rotating clockwise, reset and manage only rotating ratchet pipe, so that the arm of ratchet freely can interact with the toothing 242 in clutch element.When dialling tune component and rotating counterclockwise, reset pipe and ratchet ticking arm direct interaction, thus towards pen center away from clutch tooth promote ticking arm, therefore the moment of torsion caused due to the spring by loading, so that the ticking arm on ratchet can rearward movement " ticktack ".

In order to carry setting dosage, as shown in FIG 3 B, release button 290 is promoted in a distal direction by user.Reset pipe 260 and adjust component disengaging to couple with dialling, and clutch element 240 departs from housing spline 204 subsequently.Now, stirring machinery and return to " zero " together with driving element 230, this causes the dosage of medicine to be discharged.Can stop at any time by release or promotion button and start dose during medicine carries.Dosage less than 5 IU is generally not capable of suspending, this is because when piston returns to original size, rubber piston is very rapidly compressed, thus causes the compression of rubber piston and the conveying of insulin subsequently.

EOC feature prevents user from setting the dosage bigger than the dosage staying in sleeve.EOC component 228 is rotationally locked to reset pipe, and this makes EOC component rotate during dosage setting, replacement and dosage carry, and in the meantime, EOC component can be along with axially-movable before and after the screw thread of piston rod.Being provided with retainer when it arrives the proximal end of piston rod, this prevents the part of all connections, adjusts component including dialling, further rotates on dosage setting direction, i.e. the dosage set now is corresponding to remaining drug substance contents in sleeve.

Scale drum 270 is provided with the far-end stop surfaces of the corresponding stop surfaces being adapted to engage on enclosure internal surface, this provides the maximal dose retainer for scale drum, thus prevent the part of all connections, adjust component including dialling, dosage setting direction further rotates.In the embodiment illustrated, maximal dose is set to 80 IU.Correspondingly, scale drum is provided with the near-end stop surfaces of the corresponding stop surfaces being adapted to engage on spring base component, and this prevents the part of all connections, adjusts component including dialling, dosage discharge direction further rotates, thus " zero " retainer for whole discharge machinery is provided.Hereinafter, dial tune component and will be referred to as " zero dose position " in the position completing to present after the discharge of setting dosage.

In order to prevent the something in stirring machinery to lose efficacy, thus allowing scale drum motion beyond the unexpected excess in the case of its zero position, EOC component is used for providing security system.More specifically, in the original state about a complete set of cylinder, EOC component is oriented to contact with driving element in the axial location of distalmost end.After given dose has been discharged, EOC component will be oriented to contact with driving element again.Correspondingly, EOC component will lock against driving element, in case machinery attempts the conveying dosage beyond zero position.Due to the tolerance of different piece and the motility of machinery, EOC, by short distance of advancing, is enable to discharge the medicine of little " excessive ", the insulin of such as 3-5 IU.

Discharging machinery and also include dose termination (EOD) ticktack feature, it clearly feeds back in the termination offer of discharge dosage, informs the user that the whole amount having had been drained off medicine.More specifically, EOD function is realized by the interaction between spring base portion and scale drum.When scale drum returns to zero, the little ticking arm 206 on spring base portion is pushed backwards by the scale drum advanced.Just before " zero ", arm is released, and the counterbore surface that arm collision is in scale drum.

Shown machinery is additionally provided with torque limiter, in order to protection machinery avoids dialling, by user, the overload adjusting component to apply via dosage.This feature adjusts component and the interface reset between pipe to provide by dialling at dosage, and dosage is dialled tune component and is rotationally locked with one another as mentioned above with resetting pipe.More specifically, dosage dials tune component is provided with circumference inner teeth structure 281, it engages the some corresponding teeth being arranged on the flexible carrier part 261 resetting pipe.Reset pipe tooth and be designed to the moment of torsion of the given regulation largest amount of transmission, such as 150-300 Nmm, exceed peak torque, flexible carrier part and tooth will bend inwardly, and make dosage dial tune component rotate in the case of the remainder not having rotary dial machinery.Therefore, the machinery inside pen can not be applied in stress under load more higher than the load that torque limiter is transmitted by tooth.

In fig. 3 c, clutch element, driving element and housing (locally) are illustrated in dosage setting state, and in fig. 3d, same parts is illustrated in discharge state.As present, not shown being disposed with thereon drives the piston rod of element and the mounted thereon ratchet pipe having clutch element.In order to preferably illustrate the structure in the interior surface being arranged on housing, Fig. 3 E illustrates the part clutch element 240 being arranged in housing 201.

The interior surface of housing 201 includes that the spline elements 204(reaching the axial orientation in inside each has slightly pointed distal end 209) circumferential annular array and the circumferential annular array of single direction ratchet tooth 205.Interior surface also includes male form screw 203, and it is adapted to engage in the female screw 273 in scale drum 270.Far-end circumferential recess is formed to engage and installs nut member 225.Clutch element 240 includes: the internal circumferential annular array of the hook tooth 242 of the arm of ratchet 252 being adapted to engage on ratchet pipe 250, exterior circumferential annular array with the spline elements 241 of axial orientation, described spline elements 241 is adapted to engage with the spline elements 204 of housing and the connection slit (participating in hereafter) in driving element, and each spline is respectively provided with the proximal end 243 of point.Driving element 230 to include paired relative coupling part, each coupling part all includes two skirt portion 232 towards proximal extension, forms axially extended connection slit 233 between skirt portion, and slit is adapted to engage with a part for clutch element spline elements.By this way, composition surface be used as by from clutch element revolving force and therefore moment of torsion be transferred to be in the driving element of discharge state.Driving element also to include the most circumferentially extending paired flexible arm of ratchet, it is adapted to engage with the annular array of single direction ratchet tooth 205.During dosage carries, drive element to rotate counterclockwise, and due to the joint with hook tooth 205, arm of ratchet 235 also provides the user little ticktack, such as, often discharges one ticktack of units of insulin.In the embodiment illustrated, 24 hook tooths of 15 degree of rotations corresponding to per unit insulin it are provided with.The centre bore driving element includes two relative protuberances 231, and it is suitable to engage with the groove of the axial orientation on piston rod.

In the dosage setting state illustrated in fig. 3 c, the spline elements 241 of clutch element engages with the spline elements 204 of housing, thus relative to housing spin locking clutch element.As seen from Fig. 3 C, a group clutch spline elements is received in the connection slit of correspondence with slight rotary play.In the discharge state illustrated in fig. 3d, spline elements 241 distal movement of clutch element becomes to be disengaged with the spline elements 204 of housing, so that clutch element can rotate relative to housing.As seen from Fig. 3 D, described a group clutch spline elements is received in the connection slit of correspondence now in the case of not having rotary play.

Fig. 3 C illustrates clutch element 240, the exterior circumferential annular array of the spline elements 241 of its above-mentioned internal circumferential annular array illustrating hook tooth 242 and axial orientation.As present, spline elements not on ring equidistant placement but be arranged in a cluster, described group includes two relative connection groups 245, its be used as engage couple slit 233 coupling arrangement.But therefore, only some in spline elements are used as at clutch element and drive the coupling arrangement between element, but all of which is used as the coupling arrangement between clutch element and housing spline 204.

Turn to Fig. 4 A and Fig. 4 B, it is shown that according to the exemplary first embodiment of the automatic injection device 100 of the present invention.Automatic injection device 100 limits housing 101, and its receiving includes spring driven discharge machinery.The operating principle discharging machinery can discharge machinery design according to the prior art combined described by Fig. 1 to Fig. 3 E.But, in other embodiments, the replacement spring driven discharge machinery with other operating principles can be used.As nonrestrictive example, at WO The operating principle of the automatic injection device disclosed in 2008/116766 can instead be utilized.

Fig. 4 B illustrates the automatic injection device 100 being in its storage state, i.e. before equipment has been put into using, or alternatively, after being completely exhausted out setting dosage.The proximal end that release button 190 is arranged to from housing is stretched out.In the embodiment illustrated, release button 190 is used as to be similar to the activation of equipment or the trigger button 190 illustrated in fig. 1-3.Release button 190 can push axially-movable between position (that is, activating position) and extended position (that is, can activate position) relative to housing.In the embodiment illustrated, release button 190 rotates fixing by means of a series of splines 194 engaging the axial path being internally formed in housing 101 relative to housing.

Dosage is dialled tune component 180 and is used as the exercisable component of user, and it can be rotated to just set dosage.And, in this embodiment, the scale drum 170 of the generic tubular of equipment being similar to illustrate in fig. 1-3 is used as dosage setting equipment according to the present invention.Scale drum 170 is threadedly engaged with housing 101, to form multi-turn dose titration device.Further, scale drum includes axial path, and it is bonded on dosage and dials the connection element formed in tune component 180, in order to dosage dials the rotation adjusting the rotation of component 180 to cause scale drum.But this joint still allows for dialling, at dosage, the motion to axial adjusted between component 180 and scale drum.When scale drum rotates relative to housing, a series of dosage instruction being placed in scale drum 170 along spiral path can be observed by window 102.As long as scale drum 170 presents its zero dose position (referring to combine the discussion of Fig. 1-3, corresponding to the termination of Dose location), breech lock function just couples release button 190 and activates in position to be retained in by release button with scale drum 170.

Fig. 4 A illustrate be in dosage dial adjust component 180 by rotation process to set the equipment 100 of state of dosage.Scale drum the most correspondingly rotates, and according to housing be threadedly engaged axially-movable.The reading setting dosage substantially can be observed in window 102.When scale drum moves away from its zero dose position, discharge described breech lock function.Release spring 195(sees Fig. 5 A and Fig. 7) it is accommodated in housing, and be configured to produce bias force with towards activating position propelling release button 190.Therefore, when breech lock is released away from zero dose position by stirring, release button 190 is automatically pushed to it and can activate in position.

According to combining the operating principle that Fig. 1-3 discusses, after having set dosage, release button 190 can be operated by release button is shifted onto its activation position.This will trigger discharging operation, to discharge the dosage of the medicine of the size corresponding to setting dosage.Being discharged along with setting dosage, scale drum 170 is rotated back to its zero dose position, the termination of described zero dose position limiting dose state.This state is corresponding to the state illustrated in figure 4b.When scale drum arrives its zero dose position and user's release is applied to discharge the power on button 190, due to breech lock function, so release button is stayed in activation position.For a user, this has arrived at its confidence level terminated by increasing the discharge setting dosage.Meanwhile, release button 190 push position for indicating, dosage dials tune component 180 to be needed to be operable to set dosage before being able to carry out new injection.

Fig. 5 A illustrates the perspective view of the partial cut of the automatic injection device 100 being in Fig. 4 A that dosage has been dialled big state, and Fig. 5 B is shown in and discharges the respective view of equipment 100 after all dosage.In figure 5b, scale drum 170 presents its zero dose position.In figure 5b, scale drum 170 is visible in its zero dose position.Further, latch arms 192 can be observed.

As the most visible in figure 5 c, scale drum 170 includes being arranged in the path at the proximal face of scale drum or otch 172.In the embodiment illustrated, otch is generally L-shaped.Path or otch 172 are configured for engaging with latch arms 192.Latch arms 192 is formed hook, and it is mounted relative to release button 190, in order to prevent the motion to axial between release button 190 and latch arms 192.Latch arms 192 includes enlarged head 193, and it limits the breech lock geometry being formed to be received in otch 172.Otch 172 limits the circumferentially extending free end 174 of scale drum 170, and it is used as to be suitable to retain enlarged head 193 and retains geometry with the cooperation of opposing proximal movement.

In figure 5b, when scale drum rotates towards its zero dose position, the enlarged head 193 of latch arms 192 is inserted in l shaped incision 172.When arriving its zero dose position, enlarged head 193 is axially retained relative to scale drum 170, and therefore release button 190 is resisted and is retained in it by the release power that applied of spring 195 and activates in position.

Because scale drum axially-movable when it rotates, so there will be only a specific dose setting position, i.e. zero dose position, wherein, the l shaped incision and holding that engage scale drum 170 are retained in activation position by the enlarged head 193 of latch arms 192.Therefore, when scale drum presents any other position in addition to its zero dose position, enlarged head 193 will be axially separated from l shaped incision and free end 174.Therefore, were it not for external force and be applied in a distal direction discharge on button 190 attempt triggering equipment, then release button 190 will can activate position towards it constantly advanced by discharging spring 195.

In the equipment 100 illustrated, enlarged head 193 has the radially outward-oriented surface of inclination, its surface being radially-inwardly facing being suitable to slide against the free end 174 of scale drum 170.Latch arms 192 can be formed by flexible material, in order to if enlarged head 193 is moved to remote location scale drum simultaneously by proximally position presents its zero dose position, then latch arms can be bent radially inward.If dosage is dialled greatly unintentionally by user, then directly scale drum clawback is not triggered discharge program to its zero dose position, be then likely to occur this situation.This will typically result in activator button and stays it and can activate in position.But when enlarged head 193 is pushed on axially in a distal direction and crosses the free end 174 of scale drum 170 and promote so that enlarged head 193 is inserted in l shaped incision 172 towards far-end further, flexible latch arms makes latch arms to be bent radially inward.Therefore, when scale drum 170 presents its zero dose position, manually promote activator button to activate in position to it only by applying distal force on activator button, from it, release button 190 can be activated position to be pushed to its activation position, and rebuild activator button reservation in it activates position.

Fig. 6 and Fig. 7 provides the additional views of the internal part combining the breech lock function that Fig. 4-5 is discussed.Fig. 6 is depicted at release button and the perspective view of scale drum 170 of retention position, and wherein, scale drum presents its zero dose position, and wherein, release button presents it and activates position.The enlarged head 193 of latch arms 192 is positioned in l shaped incision 172.Fig. 7 is schematically shown at the side view of the partial cut of the automatic injection device shown in Fig. 4 A of the state that dosage has been set.Especially, this view reflects the structure of release spring 195.

For specific embodiment (not shown), breech lock geometry and cooperation retain in geometry can include tilting cam, and breech lock geometry and cooperation retain in geometry another can include the cam follower for engaging cam.Cam and cam follower can be formed release button not to be applied the outside distal force applied, and release button presents when can activate position, cam and cam follower work when dosage setting equipment returns to zero dose position so that discharge button motion in its activation position.Therefore, in such an embodiment, when user does not push release button towards zero dose position clawback, release button will be automatically withdrawn at its activation.

Fig. 8 A and Fig. 8 B depicts state according to the second embodiment of the present invention, and wherein, the automatic injection device of Fig. 1 has been modified to include and has combined the breech lock function that Fig. 4-7 is discussed.Fig. 8 A is corresponding generally to the state illustrated in figure 3 a, and Fig. 8 b is corresponding generally to the state that illustrates in figure 3b.

The latch arms 1092 being corresponding generally to latch arms 192 is incorporated in the proximal end of equipment 1000.Latch arms 1092 includes enlarged head 1093.Latch arms is stretched out by the opening in spring base component 1008.Latch arms 1092 is installed into rotate fixing relative to housing 1001, but can be relative to housing 1001 and spring base component 1008 axially-movable.The proximal end of latch arms 1092 engages replacement pipe 1060 as follows, i.e. makes resetting between pipe 1060 and latch arms 1092, and prevent from moving to axial allows relative rotary motion simultaneously.Therefore, latch arms 1092 is relative to release button 1090 axial restraint.

Scale drum 1070 is corresponding generally to scale drum 170.Scale drum 1070 includes l shaped incision 1072, its enlarged head 1093 being suitable to receive and retain latch arms 1092.

Which depict equipment 1000 at Fig. 8 B(, wherein, the most do not stir dosage, i.e. wherein scale drum is in its zero dose position) in, release button 1090 is retained in it and activates in position.The equipment 1000 that wherein dosage has been struck is which depict at Fig. 8 A() in, scale drum 1070 according to screw thread 1003 towards distal movement, and the most therefore release spring 1095 promotes release button 1090 can activate in position to it, get out equipment and discharge setting dosage to be triggered.When completing the discharge setting dosage, release button 1090 will present identical relevant position as shown in FIG. 8B with scale drum 1070, and release button 1090 will be retained in it and activate in position.But, piston rod (without reference) will correspond to the movement size of discharge dosage along distal direction.

Fig. 9 A and Fig. 9 B depicts the 3rd embodiment of the automatic injection device 1100 according to the present invention, and wherein, the automatic injection device 1000 of Fig. 8 A and Fig. 8 B has been modified to include breech lock function, and it is different from the breech lock function combined described by Fig. 4 A to Fig. 8 B.

The breech lock function of the embodiment of the automatic injection device 1100 shown in Fig. 9 A and Fig. 9 B schematically shows the most further.

Replacing the l shaped incision with wherein scale drum to receive the breech lock function of the also enlarged head of engaging latch hammerlock, this breech lock function depends on the engaging function between release button 1190 and scale drum 1170.This engaging function is generally through arranging fastener work, and this fastener makes scale drum 1170 and release button 1190 about being engaged with each other and being disengaged only by axially displacement.

In the third embodiment, breech lock geometry includes the engaging arm 1192 that can be bent radially inward.The distal end of engaging arm 1192 includes engaging protuberance 1193.In in other respects, engaging arm 1192 is similarly configured to engaging arm 1092 discussed herein above.

As drawn in Fig. 10, scale drum 1170 includes the recessed path of internal circumferential 1172, and it presents its zero dose position in scale drum and is suitable to receive engaging protuberance 1193 when discharging button 1190 and presenting its activation position.This situation is drawn in 9B.Snap-engagement between engaging protuberance 1193 and recessed path 1172 is sufficiently strong to guarantee that discharging button 1190 is retained in its activation position.

When dosage dial tune component 1180 be rotated to dial heavy dose of time, scale drum 1170 is threadedly engaged distally axially-movable according to it with housing.Therefore, engaging protuberance 1193 is pushed out recessed path 1172, thus discharges snap-engagement.This forces engaging arm 1192 to be bent radially inward, thus causes release spring 1195 that release button 1190 is advanced to it and can activate in position, as shown in figure 9 a.

During setting the discharge of dosage, and then scale drum 1170 returns to its zero dose position, and snap-engagement is rejoined the most again.Alternatively, if user dials little initial setting dosage towards zero dose position, then release button 1190 can push manually brought back to activation position in position by release button is manually shifted onto it.This is additionally operable to described snap-engagement of rejoining.

In alternative embodiments, can include tilting cam and cam follower according to the breech lock geometry of second and third embodiments, it is substantially to be formed with the same way discussed above in conjunction with first embodiment.When user reduces setting dosage by dialling little initial setting dosage towards zero dose, this feature will act as making release button automatically return to it and activates in position.

Some preferred embodiments illustrate the most in the preceding article, and but it is stressed that is that the present invention is not only restricted to these, but can otherwise be carried out in this theme limited in the following claims.

Claims

1. the automatic injection device (100 for the setting dosage of setting and drain medicine；1000；1100), comprising:

-limit distal end and the housing (101 of proximal end；1001；1101), described housing is suitable to receive sleeve (113), in order to liquid medicine can be gone out by the connection faller gill at the described distal end of described housing,

-dose setting device, described dose setting device includes being configured to by screw relative to described housing (101；1001；1101) the dosage setting equipment (170 rotated；1070；1170),

-discharge machinery, described discharge machinery includes being configured to and then activate the Spring driving from keeping sleeve automatically to discharge setting dosage,

-activator button (190；1090；1190), described activator button can be activated so that setting dosage can be discharged, and

-release spring (195；1095；1195), described release spring provides and advances described activator button (190 towards described position of activating；1090；1190) power,

Wherein, described automatic injection device (100；1000；1100) limiting breech lock, described breech lock includes being connected to described activator button (190；1090；1190) breech lock geometry (192；1092；1192) and be connected to described dosage setting equipment (170；1070；1170) cooperation retains geometry (172；1072；1172), described breech lock is configured at described activator button (190；1090；1190), when being activated, described release spring (195 is resisted；1095；1195) described power is by described activator button (190；1090；1190) it is retained in described activation position,

Wherein, described activator button (190；1090；1190) from described housing (101；1001；1101) described proximal end is stretched out and activating position and can activate axially-movable between position, and described dosage setting equipment (170；1070；1170) relative to described housing (101；1001；1101) by thread connection, in order to it performs screw during dosage setting and returns to described zero dose position away from zero dose position and when described setting dosage is discharged by screw,

Wherein:

A) when described dosage setting equipment (170；1070；1170), when presenting its zero dose position, described cooperation retains geometry (172；1072；1172) present relative to described housing (101；1001；1101) predetermined axial location, with at described activator button (190；1090；1190) when presenting its activation position, it is achieved retain geometry (172 in described cooperation；1072；1172) and described breech lock geometry (192；1092；1192) cooperation between, and

B) when described dosage setting equipment (170；1070；1170), when presenting any other position in addition to described zero dose position, described cooperation retains geometry (172；1072；1172) presenting axial location, it prevents from retaining geometry (172 in described cooperation；1072；1172) and described breech lock geometry (192；1092；1192) being used for described activator button (190 between；1090；1190) it is retained in it and activates the cooperation in position.

Automatic injection device the most according to claim 1, wherein, when described activator button (190；1090；1190) present it and activate position and by described breech lock geometry (192；1092；1192) and described cooperation retain geometry (172；1072；1172) when the cooperation between is retained, described dosage setting equipment (170；1070；1170) rotation away from its zero dose position discharges described breech lock, in order to described activator button (190；1090；1190) at described release spring (195；1095；1195) described can activation in position it is automatically moved under the propelling of described power.

3. according to the automatic injection device described in any one in claim 1-2, wherein, described breech lock geometry (192；1092；1192) it is positioned in described activator button (190；1090；1190) on, and described cooperation retains geometry (172；1072；1172) it is positioned in described dosage setting equipment (170；1070；1170) on.

4. according to the automatic injection device described in any one in claim 1-3, wherein, when described dosage setting equipment (170；1070；1170), when presenting any other position in addition to described zero dose position, described cooperation retains geometry (172；1072；1172) away from described breech lock geometry (192；1092；1192) it is spaced axially, thus prevents described breech lock by described activator button (190；1090；1190) it is retained in described activation position.

5. according to the automatic injection device described in any one in claim 1-4, wherein, described dosage setting equipment (170；1070；1170) relative to described housing (101；1001；1101) threadably coupled by lasting joint.

6. according to the automatic injection device described in any one in claim 1-5, wherein, described dosage setting equipment (170；1070；1170) can be by the rotary motion more than 360 degree relative to described housing (101；1001；1101) rotate.

7. according to the automatic injection device described in any one in claim 1-6, wherein, described breech lock geometry (192；1092；1192) include hook component, and described cooperation retains geometry (172；1072；1172) including path, described path is arranged in described dosage setting equipment (170；1070；1170) receive described hook component when rotating towards its zero dose position, thus retain described hook component to resist axial displacement.

8. according to the automatic injection device described in any one in claim 1-6, wherein, described breech lock geometry (192；1092；1192) include fastened component, and described cooperation retains geometry (172；1072；1172) include engaging retainer, wherein, when described activator button (190；1090；1190) and described dosage setting equipment (170；1070；1170), when presenting predetermined relative orientation, described fastened component is received by described engaging retainer by discharging ground and retains.

Automatic injection device the most according to claim 8, wherein, described activator button (190；1090；1190) and described dosage setting equipment (170；1070；1170) one in comprises cylinder, and wherein, described engaging retainer includes the circumferentially extending shoulder step (1172) being arranged on described cylinder, and wherein, when described activator button (190；1090；1190) present it and activate position the most described dosage setting equipment (170；1070；1170), when presenting its zero dose position, described engaging arm is configured to engage described circumferentially extending shoulder step and engage after described circumferentially extending shoulder step.

10. according to the automatic injection device described in any one in claim 1-9, wherein, described breech lock geometry (192；1092；1192) flexible member is included, when described activator button (190；1090；1190) position can be activated from it and move to described activation position, the most described dosage setting equipment (170；1070；1170) when presenting its zero dose position, described flexible member can bend, and described flexible member is used for so that described breech lock geometry (192；1092；1192) described cooperation can be engaged and retain geometry (172；1072；1172).

11. according to the automatic injection device described in any one in claim 1-10, wherein, and described breech lock geometry (192；1092；1192) and described cooperation retain geometry (172；1072；1172) in includes tilting cam, and described breech lock geometry (192；1092；1192) and described cooperation retain geometry (172；1072；1172) another in includes that the cam follower for engaging described tilting cam, described tilting cam and described cam follower are configured to, when not to described activator button (190；1090；1190) applying any outside distal force applied and described activator button presents described when can activate position, described tilting cam and described cam follower are at described dosage setting equipment (170；1070；1170) return to work during described zero dose position so that described activator button (190；1090；1190) move to it activate in position.

12. according to the automatic injection device described in any one in claim 1-11, wherein, at described dosage setting equipment (170；1070；1170) when returning to its zero dose position, described breech lock geometry (192；1092；1192) and described cooperation retain geometry (172；1072；1172) it is configured in described breech lock geometry (192；1092；1192) engage described cooperation and retain geometry (172；1072；1172) ticktack is generated time.

13. according to the automatic injection device described in any one in claim 1-12, wherein, described Spring driving includes being constructed such that the driving element (1030) of the piston distal movement keeping sleeve (113) and is connected to the spring element (1055) of described driving element (1030), and described spring element (1055) is configured for keeping the energy of storage and releases energy to advance described driving element (1030) when activating thus drive described piston to discharge setting dosage during discharge program.

14. automatic injection devices according to claim 13, wherein, described discharge machinery also includes clutch element (1040), and described clutch element is coupled to described activator button (190；1090；1190) and described driving element (1030) is to control the release of the energy of the storage of described spring element (1055), and wherein, when described activator button (190；1090；1190), when being in described activation position, described clutch element (1040) realizes the release of the energy of storage, and when described activator button (190；1090；1190) being in described when can activate position, described clutch element (1040) prevents the release of the energy of storage.

15. automatic injection devices according to claim 14, wherein, during discharge program, are removing described activator button (190；1090；1190) during the outer distal end power the most initially applied, described release spring (195；1095；1195) described power works so that described activator button (190；1090；1190) move to described to activate position, to interrupt described discharge program.